hagel would not meet with karzai? >> he snubbed karzai. karzai said he would not let -- you wantallow certain detainees released from guantanamo. he said he might be postponing signing an agreement until april. the u.s. is not ok. the end of they year. they need to start planning the troops will stay. joined me.ler good to see you. coming up, shopping for bitcoin. the virtual currency scavenger hunt. ♪ >> digital currency, bitcoin, has had a wild ride. last week it plunged more than 20%. like baidu suspended accepting payments. so much focus, matt miller went to find out what one can actually do with a bitcoin. >> the incredible volatility of missed lastd not be week. the price shot up to more than $1200 and dropped to $600 momentarily. we thought because of that and the media attention we should do something to really figure out what this is and how it works. theame up with the idea of 12 days of bitcoin. i will do something else every day. boughtthe first day, i one. it was more difficult. i went to a number of sites. blockchain.info.